Just purchased a book from ebooks.com and it's not getting along with the EE.
It's in Adobe Digital Editions format with all the DRM paranoia in place. Before downloading the actual PDF, I am required to download an ACSM file to notify the server about the device I am dl'ing to. Next, I open the ACSM file from the Library, an action prompt pops out warning me about the content being protected and if I want to dl the PDF. I click "yes". On the notification bar across the top it displays a message saying "dowmloading content".
Sadly, at some point it dies out with this ugly message:

E_ADEPT_ACSM_NO_FULFILLMENT_TOKEN

Since I cannot buy from EE's bookstore (disavantages of being European), I am probably doomed to read all the public domain classics.
Quite annoying